Buy and price of galvanized sheet metal
As you know, some metals like steel and iron are susceptible to oxygen and are expensive, and require basic maintenance, One of the ways to preserve these metals is to use galvanized sheet.
But the main question here is where to buy these products for roofing purposes.
Galvanized sheet is an oxygen-resistant sheet that does not rust when exposed to moisture and air.
It can be conveniently used to cover the upper roofs of buildings and greenhouses, cooling passages, cabinets, heaters, and water pipes in the north of my country.
Zinc metal (ZN) is used to galvanize plate surfaces.
These sheets are available in both short and long widths and are sold raw or colored.
Galvanized sheets are usually produced by two methods, electro-galvanized or hot-dip galvanized.
In the melting bath method, cold plates are used, which are converted into galvanized plates in several stages.
For hot dip galvanizing, they first clean all the sheets so that their surfaces are free of residue, then by forming a hot bath, they slowly enter this molten bath made of zinc, down to a few micrometers, over the entire surface of the sheet.
If metallic zinc (ZN) is placed on the surface of the plate, the higher the thickness of this surface, the higher the coating and quality.
But in the other method, electro galvanization, they do it by using an electric current and a solution of zinc (ZN).
This method is more sensitive than the melt bath method and is suitable for factories that require high precision.
There are things in the chemistry that improve the quality of the plate during production, such as environmental conditions, time in the bath, internal composition of the metal, cooling rates, etc.
are all affected.
Participate in quality, which can increase or decrease the quality of the final product.
In addition to the things mentioned above, in this section, we will discuss the positive features and benefits of galvanized sheets.
easy to solder
Due to the galvanic properties of these plates, easy welding is possible for these plates.
Lower price
If you intend to produce corrosion-resistant stainless steel metal, you need to spend a lot of money to achieve the desired quality, but with the existence of galvanized sheet, stainless steel sheet can be obtained at a lower price.
Reasonable maintenance costs
As you know, metals corrode in air, leading to an average annual corrosion cost of $200 billion in the United States.
Therefore, covering the metal with zinc will be more economical and will greatly reduce maintenance costs.
For example, zinc now protects the Eiffel Tower, a symbol of France, from corrosion.
flexibility
Another advantage of galvanized sheets is their high flexibility, they can be easily made into different shapes and they can add to the beauty of the objects they make.
Sometimes these sheets are produced in different colors for added resistance and aesthetics, and to attract the attention of others due to their shiny appearance.
What is the galvanized coating?
To measure the diameter of the zinc metal layer placed on the plate, the term coating is used, the greater the amount of this coating, the larger and thicker the layer on the plate.
Each factory in each country uses its own coating number and produces galvanized sheets on this basis.
buy galvanized sheet
There are many ways to buy a galvanized sheet, today many companies are engaged in the production of galvanized sheets, if you need it, you can buy galvanized sheets according to the size and coating you need by visiting their website and placing an order.
You can use the elemental density formula to get the desired paper weight with a specific size.
Today, moisture is the biggest threat to the health of steel structures.
In addition to moisture, damage such as fires, storms, and torrential rain is one of the main threats.
But interestingly, if metal buildings are properly covered, they are uniquely resistant to these threats and will not rust from prolonged humidity.
Widely used in all walks of life, the galvanized sheet has a special coating to prevent it from rusting when exposed to moisture.
The reason for the popularity of galvanized sheets also stems from this problem.
Galvanizing is one of the most important and common methods of protecting steel sheets from threatening factors such as corrosion.
This is done by covering the primary metal surface with a layer of protective metal, usually zinc metal, also known as galvanic protection.
The resistance that the existing galvanized layer exhibits on the surface of the galvanized sheet depend on the thickness of the layer.
It should be mentioned that galvanizing is one of the most common and also one of the most economical methods of protecting steel structures from ambient humidity.
What is the basis of the appearance of the galvanized sheet?
Galvanized sheet is divided into three categories according to their appearance.
Depending on the appearance of galvanized sheet, you may be interested to know what are the names of these three categories.
Hard galvanized plate
Differences in the formation of mud on the plate, also known as crystallization, cause these three types of differences, which are caused by the cooling rate of the plate and the amount of zinc used in the electroplating process.
What are the advantages of using galvanized sheets?
The use of galvanized sheets is very common in various industries, especially in the construction industry.
These types of sheets are very useful in today's world as we discuss their benefits further.
Long-lasting
The service life of galvanized sheet in a highly corrosive environment will be between 20 and 70 years.
It is worth mentioning that the amount of steel that is exposed to corrosive materials can have a big impact on service life.
discount
As we mentioned earlier in our answer to the question of what is galvanized sheet is, bonding the molten surface and the steel together will result in a very durable product.
Compared to other methods, this method is low maintenance, so galvanization can be used to prevent rust.
Before answering the question of where to buy galvanized metal and steel sheets we better know the functions and applications of galvanized sheet.
Galvanized sheet is used in various industries due to their properties.
These sheets are used to prepare the following products:
- Industrial cable tray
- Industrial cable ladder
- Industrial electrical steel pipes
- Heating pipes for home use
- cooler tunnels used in the home
- gable for house
- Water pipes are used in various places
- Iron can corrode and cause damage to any equipment.
Galvanized type
Most galvanized sheets are available in widths of 1000 and 1250 mm.
Meanwhile, the sheet sizes produced by the fabric method are 1000 x 2000 and 1250 x 2500 mm.
The weight of these products is a function of their thickness, however, rolls of galvanized sheet typically weigh between 5 and 7 tons.
The standard thickness used by most factories to produce these sheets is between 0.
2 and 6 mm.
Galvanized sheet production process
Oil plate is the main raw material for making galvanized plates.
After entering the production line, this sheet is galvanized through the following steps:
Oil-coated plates produced by the cold rolling method are assembled into a continuous strip by a welding process.
In the next step, these plates must go through an acid washing process using alkaline substances to decrease.
To keep the surface of the sheet free of impurities, you should first brush it on and then wash it with lukewarm water.
Finally, the plate is dried near hot air.
During the annealing phase, the clean coils are protected by the atmosphere.
This step is carried out through 3 processes of preheating, heating, isothermal, and then cooling according to the product's application so that the product is ready to enter the molten pool filled with molten metal.
The coil from the previous step goes into this vessel and is covered with a protective layer of zinc.
One of the main steps in the production of the galvanized sheet is to control the thickness of the top layer of the product.
To control this factor, the plate enters the air jet stage after leaving the zinc bath.
The air jet stage is actually the stage where the plate is exposed to cold air and experiences a temperature reduction.
Immerse the product in a tank of cold water and place it near the air to allow the sheet to cool completely and be ready for the next step.
The next step is quality control; the thickness of the zinc coating is measured using special equipment.
If the surface of the plate is not smooth, enter the stage of rolling shell and thread correction.
In the final production process, the so-called chromate stage, a thin layer of chromium solution is sprayed on the plate to keep it rust-free in storage.
After the plate leaves the chrome plating stage, the product is quality checked and coated with a protective oil using an electrostatic lubrication device and packaged.
The steps and process of galvanized sheet production
First, the oil sheets produced in the cold rolling process are joined together by a welding machine to produce a continuous strip.
Before entering the production stage, the plate must be degreased using alkaline substances in the pickling process, then scrubbed with hot water, and finally blown dry with hot air until the metal surface is free from rust.
Any kind of impurities.
The next stage is the annealing group where the clean coils are protected from the atmosphere.
In the annealing stage, according to the final application of the plate, there are three processes of preheating, heating and isothermal, and finally the temperature required to enter the molten pool stage is provided by the cooling system.
After the annealing step, the coil is immersed in a bath of molten metal, which places a protective layer on both sides of the metal surface.
Galvanized plate
To adjust the thickness of the zinc metal on the surface of the plate, one enters the air jet stage.
Then, the sheet was exposed to cold air to reduce the temperature of the sheet, after spraying with water, the sheet was cooled in a water bath, and the sheet was exposed to air to dry.
The surface coating of the metal is controlled by a thickness measuring device that enters the rolling stage and line correction to control the surface finish.
Finally, it enters the chrome plating stage, where a thin layer of cream solution is sprayed on the surface of the sheet in preparation for storage and antifouling.
After the inspection and quality control stage, a layer of protective oil is sprayed on the metal surface through an electrostatic lubrication device, and then packaged to enter the market.
Factors that determine the cost of electroplating
Finally, the produced galvanized sheet is priced according to the production steps.
Factors affecting the price of galvanized:
- Manufacturer of galvanized sheets
- How to make galvanized
- Final weight of galvanized sheet
- Sizes and dimensions of plates
- Zinc flake cover
- Final sheet quality and production standards
Advantages of using galvanized in various industries
- Production costs are lower and the electroplating process is cheaper than other protection methods.
- Low maintenance and repair costs
- Long service life due to resistance to environmental factors such as rust and corrosion
- Reduce the duration of galvanizing production
- Quality appearance compared to other sheet metal
- During the galvanizing operation, all surfaces and corners of the plate are protected against environmental factors.
- malleable and malleable
- Ability to weld
Use of galvanized sheets in various industries
- Galvanizing is used in various industries due to its high resistance to environmental factors, including:
- Manufacture and production of heating and cooling units, washing machines, and other household appliances.
- Electrical industry, such as switchboards and cable trays
- The computer and electronics industry
- Automotive industry (manufacture of body and interior parts)
- The automotive industry
- In industries that require painting, cutting and shaping of metal.
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